Small paratype of Opistognathus ctenion (NSMT-P 130174, 17.3 mm SL) A fresh and B preserved specimens, photographed by G. Shinohara and K. Fujiwara, respectively.

 
 
  Part of: Fujiwara K, Motomura H, Shinohara G (2023) Opistognathus ctenion (Perciformes, Opistognathidae): a new jawfish from southern Japan. ZooKeys 1179: 353-364. https://doi.org/10.3897/zookeys.1179.109813